Improvement in ore-concentrators



J. V. POMEROY. V oRE-CONCENTRATOR.

NQ,17o,e4z, Patented Nov. 30,1875.

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WITNESSES:

momma NA PETERS, PHOTLlTl-IDGRAPMER, WASHINGTON. D C.

UNITED STATES PATENT OFFICE JAMES v. POMEROY, OE BOULDER, COLORADOTERRITORY.

IMPROVEMENT INv ORE-CQN'CENTRATORS.

Specication forming part of Letters Patent No. l 70,642, dated November30, 1875; application filed August 21, 1575.

To all whom it may concern:

Be it known that I, JAMES V. POMEROY, of Boulder, in the county ofBoulder and Territory of Colorado, have invented a new and ImprovedOre-Goncentr'ator, of which the following is a specification:

In the accompanying drawing, Figure 1 represents a vertical longitudinalsection of my improved ore-eoncentrator on the line c c, Fig. 2; andFig. 2, a top view of the same.

Similar letters of reference indicate corresponding parts.

My invention relates to improvements in the Ore-concentrator which hasbeen patented to me under date of Mayll, 1875, and numbered 163,104, sothat the operation of the same is more eil'ective, and the same can beworked with or without the concentrating-pans.

The invention will first be described in connection with drawing, andthen pointed out in claims.

A in the drawing represents the supporting-table, which is constructedwith a'stepshaped bottom, that forms a series of levels for theconcentrating-pans B, the steps and head-walls producing a wave actionof the water in each level or pan. The table A is supported onoscillating standards C, which are pivoted to adjustable slide-boxes Cat the lower part of the table-supporting frame, so that the center ofgravity of the table'may be changed, and a heavier or lighter shock beimparted to the same, according to the quality ofthe material.

Reciprocating motion is imparted to the table by means of a 'revolvingeccentric and adjustable cam-pieces of the table, which mechanism is soarranged that the motion and shock imparted to the table is quick andsudden when moving toward Ithe feed end, and slower and less violent atthe discharge end.

This variable motion and shock of the table produces vibrations andwaves, which convey and discharge the light material, and precipitatethe heavy parts.

The table A may be used'with or without the pans, the steps serving aspans, and creating the waves at each stroke of the reciprocatingmechanism.

The pans B are placed on the levels of the table, with the bottom of onelapping or ex- A level of greater length is arranged at thel head of thetable, and on the same placed an endlessbelt or canvas, D, onto whichthe pulp is fed through gate of hopper E, that is hinged at the head ofthe table, and seated .water-tight on the belt D by suitablespringclamps, so that it forms in this position a wall for producing awave over the belt.

lWhen the belt is charged with mineral, the hopper vis raised for aninstant, and the canvas moved forward to discharge. its load, forming anew surface for the mineral to settle thereon.

I do not confine myself to any special con. struction of cams and leversby which the reciprocating motion is imparted; but l deem it a point ofmain importance for producing satisfactory results of concentration thatthe shocks at each end should be variable, and4 regulated at the head orfeed end of the ma chine exactly in accordance with the gravity of theore, and at the discharge end with the gravity of the rock, so as tohold the one and discharge the other. The mineral is thereby regulatedand controlled on the levels and in the pans, and separated in a verysatisfactory and rapid manner from the lighter materials. As the table Ais vibrated or reciprocated to and fro, the ore is caused to dropbetween the hopper and gate, that are separated by suitablespacing-blocks, whilel the hopper, be-

ing pivoted, rises and falls, so as to allow the ore to escape readily.

Having thus described my invention, I claim as new and desire to secureby Letters Patentv 1. In reciprocating ore coucentrators, a step-shapedtable, having a series of levels at different elevations, as and for thepurpose described.

' 2. The combination in an ore-concentrator, with a series of levels atdifferent elevations, of a head-level, made longer than the others, andprovided .with an endless belt, as and for the purpose set forth.

' 3. The combination of the pans, side bolts,

table. toadjust." the"` pans.` "`t0 any inclination lied.

endf `nuts wichthe` slotted side Walls of zthe and having gam-as and forthepurpose.sneezi-` substnntially as set forth. i 4. The standardspivoted to slide-boxes, as JAMES V POMEBOY and for the purposespecified. Witnesses: 5. The combination, `with colleentrafixigtan-` T.J. GRAHAM, ble and endless belt, of the hopper, pivoted E.`L. HUBBARD.

